Substance x is placed in a cup. its shape does not change. it is then placed on a plate; its shape still does not change. substance x is most likely a a. solid b. liquid c. gas d. plasma

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline. which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above